Apparatus for wrapping tire beads



y 1937. F. J. SHOCK APPARATUS FOR WRAPPING TIRE BEADS Filed June 1, 195415 Sheets-Sheet i ll ll I l I I In I l L I It; 240 5/95 ATTO RN EYS F.J. SHOOK} "2,080,0l3,

APPARATUS FOR WRAPPING TIRE BEADS May 11, 1937.

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APPARATUS FOR WRAPPING TIRE BEADS Filed June 1, 1934 l3 Sheets-Sheet 4.97/ 6 02 (-15 v J20 J77 Q I n 1937- F. J. SHOOK 2,080;0l3 APPARATUS FORWRAPPING TIRE BEADS Filed June 1, 1934 13 Sheets-Sheet 5 m ENTOR 5000/ J//00k ATTORNEYS May 11, 1937. SHQOK 12,080,013

APPARATUS FOR WRAPPING TIRE BEADS Filed June 1, 1954 13 Sheefs-Sheet sINVENTOR I l 009m J. SHOOK I Br- ATTORNEYS y 1937- F. J. SHOOK APPARATUSFOR WRAPPING TIRE BEADS Filed June 1, 1934 13 Sheets-Sheet 7 ATTORNEYSMay 11, 1937. SH 2,080,013

APPARATUS FOR WRAPPING TIRE BEADS Filed June 1, 1934 1:5 Sheets-Sheet 81 20mm! J: Silva/r BY Q? ATTORNE'YS I May ll, 1937.v F,J,SHQOK 2,080,013

APPARATUS FOR WRAPPING TIRE BEADS Filed June 1, 1934 13 Sheetg-Shest 9 I45 I J49 54/ s g6 5/0 I {W M 140 02 m W m 02?- l 1/4 Y J75 42/ 2 1/; J79

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S/lank ATTORNEYS May 11, 1937. F. J. SHOOK APPARATUS FOR WRAPPING TIREBEADS Filed June I, 1934 13 Sheets-Sheet ll ATTORNEYS May 11, 1937. F.SHQQK} 2,080,013

APPARATUS WRAPPING TIRE BEADS Filed June 1, 1934 13 Sheets-Sheet 12 JZI/I42 5/0 6'02 kg Q 5 @455 480 43/ 12 #4 .456 42.9 M39 41% f9/ /55ATTORNEYS INVENTOR 5019/9/11 Z S/laok M y F. J. SHOOK APPARATUS FORWRAPPING TIRE BEADS File n 1. 1934 13 Sheets-Sheet l3 f N VEN roe AOlPH/N J: $400k: BY YEW ATfQRNEYs Patented May 11, 1937 caries staresAPPARATUS FOR WRAPPING TIRE BEADS Florain J. Shook, Akron, ohm, assignorto National-Standard Company, Niles, Mich, a corporation of MichiganApplication June 1, 1934, Serial No. 728,557

43 Claims.

This invention relates to apparatus for use in the making of tire beads,and more especially it relates to apparatus for folding one or moreshort lengths of wrapper material about an annular tire bead elementcomposed of a plurality of convolutions of rubberized wire tape, to bindone or both ends of the tape to the body thereof, the finished structureconstituting an inextensible bead core suitable for building into thelateral marginal portions of a pneumatic tire casing.

The chief objects of the invention are to increase production of beadcores of the character mentioned; to provide apparatus that is fullyautomatic in operation; to provide apparatus of low maintenance cost, toprovide apparatus that is capable of rapid action and large production;to provide apparatus capable of operating on bead cores of differentthicknesses; and to provide apparatus that is readily adjustable so asto operate upon bead cores having greater or lesser amount of overlap ofthe wire of which they are composed. Other objects will be manifest asthe specification proceeds.

Of the accompanying drawings,

Figure 1 is a side elevation of the bead wrapping unit of the apparatus,in inoperative position;

Figure 2 is a front elevation, on a larger scale, of the upper half ofthe mechanism shown in Figure 1;

Figure 3 is a fragmentary view similar to Figure 2 showing the mechanismin operative position;

Figure 4 is a section on the line l l of Figure 2;

Figure 5 is a section on the line 55 of Figure 4;

Figure 6 is a horizontal sectional view of one of the frictional drivingmechanisms shown in Figure 5;

Figure 7 is a section on the line l'! of Figure 1;

Figure 8 is a vertical section, on a larger scale, of the motor-drivenshaft shown in Figure '7;

Figure 9 is a sectional view of a one revolution clutch, taken on theline -9 of Figure 7;

Figure 10 is a section on the line iii-18 of Figure 9;

Figure 11 is a section. on the line H-ii of Figure 9;

Figure 12 is a fragmentary section, on a larger scale, on the line iZ-EZof Figure 5;

Figure 13 is a section, on a larger scale, on the line 53-43 of Figure5;

Figure 14 is a section, on a larger scale, of a portion of the mechanismshown in Figure 13, in the alternative position thereof, a part beingshown in elevation;

' Figure 15 is a detail view of the feed rollers at the front of thewrapping unit, and the work therein in the angular position in which iti delivered thereto;

Figure 16 is a view of'the mechanism shown in Figure 15, showing thework after it has been advanced by the feed rollers to a yielding stop,the latter controlling a switch in the electrical circuit that operatesthe device;

Figure 17 is a sectional view, partly in elevation, of theinstrumentalities that fold a wrapper, consisting of a short length ofadhesive tape, about an exposed end of the rubberized Wire tape of abead core, said instrumentalities being shown in the relative positionsthey occupy as the bead core initially is delivered thereto;

Figures 18, 19, 20 and 21 are views of the mechanism shown in Figure 17,in the succession of positions they assume in folding the wrapper tapeabout the bead core;

Figure 22 is a plan view of a fabric wrapper such as is used for bindingthe ends of the beadtape to the body thereof;

Figures 23, 24, 25' and 26 are enlarged detail sectional views of thebead core and wrapper thereon as they appear in Figures 18, 19, 20 and21 respectively;

Figure 27 is a vertical section through the lower part of the apparatusshown in Figure 1, at the front thereof, showing mechanism for operatingthe work holder thereat;

Figure 28 is an elevation of a tire bead core constituting the finishedproduct of the apparatus; and

Figure 29 is a wiring diagram of an electrical circuit by means of whichtimed operation of the wrapping unit and a bead winding device (notshown) is controlled.

The illustrative embodiment of the invention shown herein consists ofthe wrapping unit of apparatus for building bead structures forpneumatic tires, particularly such bead structures as comprise anannular bead core consisting of a plurality of convolutions ofrubberized wire tape. The function of the wrapping unit is to applyshort lengths of binder material, such as friction tape, adhesively toone or both ends of the wire tape to bind said ends to the body of thebead core.

The wrapping unit that constitutes this invention may be and preferablyis associated with apparatus for winding the bead cores, and may receivethe bead cores directly from said winding unit without manualintervention. When the wrapping unit is associated with a winding unit,electrically operated mechanism is provided for causing the wrappingunit to operate in determinate timed relation to the operations of thewinding unit. Thus when a bead core is delivered. to the wrapping unitfrom a winding unit, said bead core initially is suspended upon a pairof feed rollers that feed it angularly about itsaxis until the end ofthe wire tape on its inner periphery strikes a yielding stop, which stopis associated with a normally open electrical switch that is in serieswith a switch on the winding unit so that the wrapping unit operateswhen the latter switch closes. At the time the bead core comes to restas described, the respective ends of its constituent tape are positionedabove respective anvils that are formed with slots that are in alignmentwith the bead core, there being short strips of friction tape overlyingsaid slots. When the wrapping unit is set in motion by the winding unit,it executes a sequence of operations whereby the respective frictiontapes are folded about the bead cores in the regions of the wire tapeends and the finished work ejected from the machine.

If the wrapping unit is to operate independently of a Winding unit, itwill be set in motion by the closing of the switch that is associatedwith said positive stop. In either case the bead cores may be mounted inthe unit in chance arrangement as regards the end portions of thebeadtape since the machine includes means for turning the bead angularlyuntil said end portions are determinately positioned, and will notoperate until they are so positioned.

General description The wrapping unit herein shown is adapted to foldshort lengths of adhesive tape about a bead core I55 so as to bind therespective ends of the rubberized wire tape, of which the core isconstructed, to the body of the structure so as to facilitate subsequenthandling of the core preparatory to incorporating it on a tirestructure. This operation is especially desirable with relation to thetrailing end of the tape since this end is disposed upon the outerperiphery of the bead core and consequently is more likely to pull awayfrom the body of the core by reason of its natural springiness. Thusalthough the apparatus as shown comprises dual mechanisms of similararrangement and operation for binding the bead core in two places, it ispossible, without departing from the spirit of the invention, toconstruct the wrapping unit with but a single mechanism for binding thetrailing end of the bead core tape. Said dual mechanisms are adjustablelaterally, relatively of each other, to provide for the taping of beadcores having tape-end overlaps of different lengths.

Briefly, the wrapping unit comprises means for receiving the bead coreI55 and for feeding said bead core angularly about its 'own axis untilit reaches a determinate angular position whereat it closes anelectrical switch that is in series with switch I53 of the winding unit,a pair of reciprocable anvils having transverse slots or dies, means forpositioning short lengths of friction tape over said slots or dies,means for moving the bead core so that the regions thereof containingthe leading and trailing ends of its tape are pressed into said anvildies and subsequently lifted therefrom, means for folding the endportions of the friction tapes around the work while it is in saidanvil-wells, and means for removing the finished work from the machine.

Referring now to the drawings, the machine comprises a box-like housing335 mounted upon four wheels 333, 336 that rest upon a trackwayconsisting of flanged rails 331, 33'! positioned in front of the windingunit hereinbefore mentioned. The arrangement is such that the wrappingunit may be moved from its normal operative position, immediatelyadjacent the winding unit, to a retracted position to permit necessarywork to be done on the winding unit, for example, changing the windingform thereof. The front end of the housing 335 is provided with a pairof vertically arranged slide bolts 338, 338 which may be lowered intosuitable recesses in the floor or a transverse rail 33'! for holding thewrapping unit securely in operative position adjacent the winding unit.

The top of housing 335 consists of a baseplate 333 that is formed withvarious bearing brackets, etc. subsequently to be described. Within thehousing 335 is a support or platform 346 upon which is mounted anormally constantly I driven motor 34! that is equipped with a reductiongear device 342. Shaft 343 of the latter has keyed thereto a sleeve orquill 344, see Figures '7 and 8, upon which is fixedly mounted asprocket 345 and one unit 346 of a clutch, said unit 346 having onelateral face formed with radially disposed serrations or teeth.Journaled on quill 344 is a second sprocket 341 having a hub portionformed with radial serrations complemental to the serrations on clutchunit 346 and constituting the other unit of the clutch structure. A pairof lock-nuts 349, 350 are threaded onto the outer end portion of quill344 for holding sprocket 341 against clutch unit 346 with the clutchserrations interengaged so that sprocket 34! may be driven throughclutch unit 346 by shaft 343. By loosening lock nuts 343, 356, sprocket341 may be rotated relatively of shaft 343.

Sprocket 34! is connected by sprocket chain 352 with a sprocket 353 thatis associated with a one-revolution clutch, generally designated 354,that is mounted upon one end portion of a cam shaft 355. The latter isdisposed transversely of the apparatus and is journaled in respectivebearing brackets 356, 356 formed integral with base plate 339, atopposite sides of the machine. As is most clearly shown in Figures 9,10, and 11, the one-revolution clutch 354 comprises a cylindrical hub358 that is keyed to cam shaft 355 between an inner and an outer endplate 359, 363 respectively, which end plates are bolted togetherthrough said hub and constitute flanges therefor. Journaled upon theperimeter of hub 358 is a clutch ring 36 I the inner perimeter of whichis formed with a circumferential series of transverse, spaced slots orkeyways 332, 362. The hub 353 is formed with a radial slot or recess 363in which is slidably mounted a key 334 that is backed by compressionsprings 365. the arrangement being such that key 364 normally isyieldingly urged outwardly toward clutch ring 36! so as to engage in oneof the slots 362 therein.

The respective ends of key 334 are formed with studs 364 that extendinto respective recesses 359% 3'39 formed in the adjacent faces of innerand outer end plates 355, 363 respectively. One of the studs 334 isengaged in the forked end of a lever 366 that is positioned withinrecess 389 and is mounted upon one end of a rockshaft 391 that isjournaled in hub 358. The other key-stud 33 i is engaged by a lever 338that is disposed within recess 359 and is mounted upon the other end ofrock-shaft 361. Lever 398 is formed with an extension or dog 358 thatprojects beyond the perimeter of end plate 359. Pivotally mounted at 369on adjacent bearing bracket 355 is a three armed lever 310, one arm ofwhich normally projects into the orbit of dog 338* so as to be engagedby the latter and thereby to hold key 364 in retracted position, againstsprings 335, and out of clutch-ring-slo-ts 382. A tension spring 31Hconnected to another arm of lever 319 and to a fixed point on base 339normally urges the first mentioned arm of said lever into the orbit ofsaid dog. The third arm of lever 310 has its free end connected to alink 312 that is connected to the core of a solenoid 313. The latter isin an electrical circuit with switch 253 on the winding unit, and aswitch presently to be described on the wrapping unit, as shown inFigure 29, the arrangement being such that when said switches are closedthe solenoid 313 is energized and thereby moves lever 319 in a manner towithdraw the arm thereof from engagement with dog 368 The clutch ring361 is arranged to be constantly driven, and to this end carries the hubof sprocket 353 which is secured thereto by keys 315. Said sprocket hubcomprises two lateral sections 316, 311, section 311 being secured tosection 319 by bolts 318, 318 and yieldingly urged toward said sectionby compression springs 319 mounted upon said bolts. The adjacent facesof hub-sections 316, 311 are provided with friction facings 388, such asleather, which facin-gs engage opposite faces of sprocket 353, thearrangement being such that said sprocket may rotate relatively of itshub, upon occasion, but normally driving said hub and clutch ring 36f.

The sprocket chain 352 is driven at such speed that sprocket 353 makesless than one revolution during the interval that solenoid 313 isenergized, at which time the lever 310 is withdrawn from dog 3'58, andkey 394 is pressed outwardly into a clutch ring keyway 362, with theresult that cam-shaft 355 is driven through the agency of hub 358, thelever 388 rotating with said hub. Before lever 398 has made onerevolution, solenoid 313 has been deenergized and lever 319 again movedinto the orbit of lever-dog 368 which it engages to withdraw key 364from clutch ring keyway 392 and thus to disconnect driving connectionbetween sprocket 353 and shaft 355. Should the work in any manner becomejammed in the machine during rotation of shaft 355, the sprocket 353will move relatively of its hub sections 319, 311 by reason of itsfrictional mounting therein. The end of shaft 355 adjacent onerevolutionclutch 354 is provided with a hand wheel 382 by means of which saidshaft may be manually rotated to assist in extracting work which mayhave become jammed in the machine.

- Before manually rotating shaft 355 as described,

VAL-

ments of the dual mechanisms that wrap friction tape about the work atspaced points thereon. To provide for wrapping bead cores wherein theWrappings are spaced different distances apart, the plates 381 arelaterally adjustable relatively of each other. To this end a pair ofshafts 388, 388, each having right-hand and left-hand threads thereon,extend through said plates 381, the left-hand threads having threadedengagement with one plate and the right-hand threads having threadedengagement with the other plate. The shafts 388 are journaled at one endin suitable brackets formed integral with guiderod brackets 386, the endportions of the shafts extending through said brackets and havingmounted thereon respective sprockets 389 that are connected to eachother by a sprocket chain 399. The ends of shafts 388 are squared toreceive a tool such as a wrench whereby either shaft may be manuallyrotated, and thereby to rotate its companion shaft, to effect lateraladjustment of plates 381.

Each plate 381 has a side plate secured to its outer lateral face, inspaced relation thereto, each of said side plates being of generalT-shape and comprising a horizontal portion 392 and a verticallydisposed cross-piece 392 the front margin of the latter beingtransversely aligned with the front margin of plate 381.

Means for receiving the work and feeding it longitudinally When a beadcore l55 is delivered to the wrapping unit, it drops upon a pair ofrelatively widely spaced apart, flanged feed rolls 393, 393 that arefrictionally driven in the direction indicated by the arrows in theseveral drawings. Each roll 393 is mounted upon the front end of ahorizontal shaft 395 that is journaled at its front end in a slide 39%mounted for horizontal movement in a dovetail slidevvay 391 secured onthe outer face of outer plate member 392 At its rear end each shaft 395has a slip joint connection with a short shaft 398 journaled in abearing bracket 399 mounted upon the outer face of outer frame member392% at the rear thereof. Said slip joint connection is best shown inFigure 6, and comprises a longitudinally slotted sleeve 400 secured toone end of shaft 398 and embracing the adjacent end of shaft 395, and apin 38! in the latter extending into said slot in said sleeve, thearrangement permitting axial movement of shaft 395 relatively of shaft398.

Each shaft 393 has a spiral gear 493 journaled thereon between a fixedflange 398 formed on said shaft and a collar 493 that is slidableaxially thereon, said collar being yieldingly urged toward said gear bymeans of a compression spring 485 mounted upon the shaft between saidcollar and lock nuts 399 threaded onto the end of the shaft. Theadjacent faces of flange 398 and collar 994 have respective facings 591of frictional material such as fibre or leather so that shaft 398 and395 may be frictionally driven when gear 93 is rotated.

The spiral gears 393 are meshed with respective spiral gears 499, 999,Figures l and 7, that are slidably keyed for axial movement upon ahorizontal shaft H9 that is disposed transversely of shafts 398 and isjournaled in the brac- 442 that is connected by sprocket chain 4| 3 tosprocket 345 previously described on constantly driven shaft 343. Thearrangement is such that feed rolls 393 are constantly frictionallydriven, 5 in the same direction so as to feed a bead core 555longitudinally about its own axis. The purpose of this work-feedingoperation is to bring that portion of the work, Where its respectiveends overlap, to a determinate position in the wrapping unit. It will beobserved that plates 331 may be adjusted laterally of each other withoutdisturbing the driving connection between shaft 449 and shafts 395.

The feed rolls 393 are movable axially in timed v relation to themovement of the reciprocable anvils subsequently to be described for thepurpose of being in work-receiving position when a bead core isdelivered to the wrapping unit, and for moving out of the plane of thebead core, after the latter has been bound with friction tape, to permitremoval of the finished work from the machine. To this end each slide396 is provided with a rearwardly extending stem or push rod 415 thatextends freely through an aperture in a block 4I6 that is fixed to theouter face of outer plate member 392. The rear end of rod 445 carries ahead or collar 4H, and a compression spring M8 is mounted upon the saidrod between its head 4H and block 416, the arrangement being such thatslide 396 normally is urged rearwardly. The head 411 is disposed closeto side plate 392*, in the path of a reciprocable slide block 4l9 thatis associated with the anvil-operating apparatus, as is most clearlyshown in Figures 4 and 5. The said slide block moves to a forwardposition when the anvil is projected to operative position, and thusslide 395 and with it feed roll 393 are moved forwardly towork-receiving position, against the pressure of spring 418.

Associated with each feed roll 393 is a placer plate that assists inmaintaining the work in a vertical plane when it is positioned upon saidfeed rolls. These placer plates are not identical in size and shape,that designated 422 and associated with the right-hand feed roll, asviewed from the front of the machine, being somewhat larger than theplacer plate designated 422 which is associated with the left-hand feedroll.

The said placer plates are mounted upon the front ends of the respectiveslides 396, immediately behind feed rolls 393, and each plate has itsfront face recessed slightly to receive the adjacent inner flange of thefeed roll. Placer plate 422 carries the mechanism that stops bead core455 in determinate angular position as it is being fed longitudinally byfeed rolls 393, and also carries a'normally open control switch thatbecomes closed as the work comes to a stop, see Figures 0 15 and 16.

For so stopping rotation of the work, a bracket 424 is pivotally mountedat 425 on placer plate 422, said bracket carrying a normally verticallydisposed rod 426 that is slidably mounted in said bracket and yieldinglyurged upwardly therein by a compression spring 421, there being a stoppin 428 through the lower end of the rod to limit said upward movementthereof. The upper end of rod 426 carries a pawl or finger 429 that isso positioned as yieldingly to engage the inner peripheral surface of abead core I55 when the latter is supported upon feed rollers 393. Thebracket 424 is provided with a laterally extending arm 433 that has itsfree end connected to one end of a tension spring 43! connected at itsother end to a fixed point on placer plate 422. A stud 432 projectingfrom plate 422 is abutted by said arm 439, said stud constituting apositive stop for bracket 424 whereby the latter normally is yieldinglyheld in vertical position by spring 43L The bead cores I55 are so woundthat when one of them is rotated longitudinally in the directionindicated by the arrows, the inner end of its constituent wire tapemoves toward pawl 429, and by engaging the same, tilts bracket 424 fromthe position shown in Figure 15 to the position shown in Figure 16,against the tension of spring 431. When the tension of spring 431 stopsfurther tilting of bracket 424 and longitudinal movement of bead coreI55 ceases, feed rolls 393 stop rotating by reason of slippage betweengear 403 and friction discs 491.

Mounted upon the back of placer plate 422 is a normally open electricalswitch 435 that is in series with switch I53 of the winding unit in theelectrical circuit that comprises solenoid 313, shown in Figure 29.Switch 435 has an operating stud or" button 436 so positioned as to beengaged by a threaded stud 431 adjustably mounted upon a portion ofbracket 424. Stud 431 engages button 436 toopen switch 435 when bracket424 is in the upright position shown in Figure 15, and releases saidbutton to close the switch when said bracket is tilted to the positionshown in Figure 16. When switch 435 is closed by action of the work asdescribed, the wrapping unit is in position to execute a cycle ofoperation, waiting only upon closing of switch I53 on the winding unit,

The anvils The wrapping unit comprises a pair of reciprocable anvils,generally designated 439, 439, which are projected to forward positionto determinately position respective short pieces of friction tape withrelation to a bead core on feed rolls 393 and to assist in folding saidtapes about said bead core, and thereafter are moved to a retractedposition to permit removal of the finished work from the machine. Therespective anvils are positioned between a plate 381 and side plates 392392 at substantially the same elevation as feed rollers 393, thearrangement being such that a bead core supported normally on said feedrollers will extend over the anvils, as indicated by broken lines inFigure 2. The details of an anvil and its operating mechanism are bestshown in Figures 13 and 14 to which attention especially is directed.

Each anvil 439 is a rectangular, box-like structure that rests upon aroller 44l that is journaled upon a pin 442 carried by one arm 443 of atoggle, the other arm 444 of said toggle being pivotally connected bypin 445 to arm 443, and having its other end fixed upon a short shaft446 that is journaled in the forked upper end of a post 441. The latteris yieldingly mounted in a sleeve 448, there being a compression spring449 between the top of sleeve 448 and the forked upper end of post 441.Lock nuts 459 on the lower end of post 441 retain it in sleeve 448 andlimit its upward movement under impetus of spring 449. The sleeve 448 isthreaded into a bearing bracket 45! that is fixedly mounted betweenplate 381 and the lower end of side plate 392, the lower end of sleeve448 having a worm gear 452 slidably keyed thereon. Said worm gear 452 ismeshed with a worm 453 that is journaled in bracket 45I and is providedwith a thumb-grip 454 whereby it may be manually rotated. Thearrangement is such that by rotating worm 453, sleeve 448 may be raisedor lowered and thus to vary the upward pressure spring 449 exerts uponthe anvil when the toggle is in the straightened position shown inFigures 4 and 13. Both pin 442 and shaft 446 extend laterally throughrespective slots 455 and 456, Figure 4, respectively, in plate 381 andside plate 392* to provide guiding means for the toggle structure.

The shaft 446 extends outwardly beyond side plate 392 and has mounted onits end portion a lever arm 459, the free end of which is connected toone end of a push-rod 466 that is slidably mounted in a guide block 46!swiveled on said side plate and has its other end pivotally connected tothe free end of a cam lever 462. The cam lever 462 is pivotallymounted/on a fulcrum pin 463 carried by a bracket 464 mounted upon plate386, the free end of said lever carrying a cam roller 465 for engagementwith a cam 466 on cam shaft 355. A compression spring 461 mounted uponpush-rod 466 and abutting guide block 46! normally urges cam roller 465against cam 466. The latter is so shaped as to move push-rod 466 to flexthe toggle as shown in Figure 14 or straighten the toggle as shown inFigures 4 and 13, to raise and lower anvil 439 for a purpose presentlyto be explained.

For reciprocating the anvils 439 to project them beyond the front of themachine and to retract them therefrom, each of said anvils is formedwith an arcuate, rearwardly extending, integral arm 469 that has aforked rear end portion provided with a transverse pivot pin 416, on theopposite ends of which are mounted slide-blocks 4l9. The latter areslidably mounted in respective horizontal slots 41!, 41! formed in plate381 and side plate 392 respectively. Connected to pivot pin 416 is aforwardly extending link 412 that has its other end connected to thefree end of a lever arm 414 that is pivoted on fulcrum pin 463. A camroller 415 on lever arm 414, at the medial region thereof, is engageablewith a cam 416 mounted upon cam shaft 355. The lever arm 414 is formedwith an angular extension 414 at its fulcrumed end, and a tension spring411 connected to said extension and to a fixed point on side plate 392normally urges cam roller 415 against cam 416. A tension spring 418connected to extension 414 and to anvil 439 urges the latter downwardlyagainst its supporting roller 44!. Cam 416 is adapted to reciprocateanvil 439 in timed relation to the raising and lowering of the anvil bycam 466.

The detail construction of each anvil 439 is best shown in Figures 13,17, and 18, wherein it will be seen that the forward portion of the topof the anvil is cut away or recessed to receive a small block 486 and alarger block 48!. A dowel pin 482 extends through small block 486 andinto suitable recesses in the anvil head and block 48! for positioningsaid blocks accurately, and a C- clamp 483 bolted to the anvil headretains the respective parts mentioned in assembled relation. The topfaces of blocks 486, 48! are formed with a local, contiguous, plateau484, and a cutter blade 485 mounted in block 488 traverses said plateauat a slight angle thereto, adjacent the rear end thereof, as is mostclearly shown in Figure 5, the cutting edge of said blade extendingabove said plateau. The position of said plateau lengthwise of the anvilmay be altered by the use of shims 486 between the end of block 489 andthe anvil structure, and the length of the plateau may be varied byshims 481 inserted between blocks 466, 48!. It is upon plateau 484 thata short length of friction tape is positioned, prior to operation of themachine.

Formed in block 48! of the anvil is a transverse die recess 488 thatopens onto plateau 484 and extends downwardly therefrom about half waythrough said block. A centrally disposed cylindrical bore 489 extendsfrom the bottom of recess 488 to the bottom of die block 48!. Mouned inrecess 488 and bore 489 is a T-shaped plunger 496, the stem of which isslidably secured in said bore by a tangentially disposed pin 49!, thehead of the plunger being of less thickness than the depth of the dierecess so as to be vertically movable therein. In front of die recess488 the plateau 484 preferably is knurled or roughened as shown at 494Figure 5. Mounted in the anvil head below plunger 496 is a cylindricalplunger seat 492 that is yieldingly urged upwardly by a compressionspring 493, the arrangement being such as yieldingly to support plunger496 with its top flush with the top of plateau 484.

As is most clearly shown in Figures 13 and 17, the head of each anvil439 and die block 48! are formed with a continuous passage 495 thatopens at its top onto. knurled portion 484 of the plateau 484, andterminates at the bottom of the anvil where it is provided with aconnection 496 to which a flexible pipe or hose 491 is attached. Theflexible hoses 491 are connected at their lower ends to a commonmanifold 498, Figure 28, that has communication with the chamber of apump or pressure cylinder 499, the pipes 491 constituting the only fluidinlet and outlet to said pump. The piston 566 of pump 499 is connectedto one end of a lever 56! that is fixedly mounted at its other end upona short rock shaft 562 journaled in a bracket 563 projecting downwardlyfrom the under side of base plate 339. Also mounted upon rock shaft 562is a bifurcated cam lever 564 that extends through the base plate andhas a cam roller on its free end in engagement with a cam 565 on camshaft 355. A tension spring 566, Figure 1, connected to lever 56! and toa fixed point on housing 335 normally urges the free end of said leverdownwardly, whereby air is forced out of pump 499. The cam 565 is soarranged as to permit spring 566 to depress piston 566 to force air frompump 499 through anvil passages 495 at one stage of operation, and tolift said piston to draw air into the pump and to create a suction onthe forward end of anvil-plateau 484 at another stage of operation for apurpose subsequently to be described.

The tape-guiding means The short lengths of friction tape used forbinding the respective ends of bead cores !55 to the body thereof areout from respective con tinuous strips of friction tape 569, 569 thatare drawn from supply rolls !6, 5!6 thereof, said supply rolls beingrotatably mounted upon respective brackets 5! that are carried by therespective plates 381 at the rear of the machine. Each of said shortlengths of friction tape is severed from a continuous tape 569 by thecooperation of the anvil blade 485 and a roller 5l3 that is journaledbetween plate 381 and side plate 392 near the front of the machine.Between roller 5I3 and tape-supply roll 5!6, the tape 569 is arranged ina sinuous course about a plurality of rotatable flanged sheaves 5 !4,5l5, 5!6, 5H, and H8, as is shown most clearly in Figures 4 and 13,which sheaves are disposed upon the outer face of plate 381. sheave 5i!is a drive pulley, being slidably keyed .upon a shaft 5i9 that isjournaled in the plates 323'! and in a bracket 525 rising from bracket355. Adjacent its outer end shaft 5H9 is provided with a pinion 521 thatis meshed with a gear 522 that is mounted upon a short shaft 523 that isjournaled in the outer end of a short arm 524 projecting laterally frombracket 520. Also mounted upon shaft 523 is a sprocket 525 that isconnected by sprocket chain 526 with sprocket 527 on cam shaft 355. Thegear ratio between cam shaft 355 and shaft 5| 9 is such that the latterwill make several revolutions while the cam shaft .makes one revolutionduring an operative cycle of the machine. A scraper 528 bears againstpulley 5!! to prevent the tape 509 from adhering thereto.

sheave 555 is journaled in the free end of a short arm 5311, Figures 1and 4, that is swiveled on the same axis as sheave 5M. A support bracket53l is provided for limiting the angular movement of arm 539 and sheave5l5 under the force of gravity. Thus sheave 5I5'is disposed in a storageloop or festoon of tape 599 between sheaves 5M and 5%. The loop isshortened and sheave 5E5 lifted to the position shown in broken lines inFigure 4 when material is withdrawn from the. loop to form a shortlength of wrap for a bead core. The sheave moves back to its full lineposition by gravity when material is fed into the loop by rotation ofdriven pulley 5H, the feed of the materiallceasing when the loop is fulland the tape becomes too slack to have frictional driving engagementwith said driven pulley. A leaf spring 532 bears upon the tape 599 onsheave 514 with the result that the tape always is withdrawn from thestorage loop under constant uniform tension, and there is no backwardpull on the tape between roll 513 and sheave 5M. Adjusting means. 535 isprovided for varying the pressure of spring 532. A pivotally mounted,laterally flanged guide 533 is positioned posteriorly of roll 5l3, itsforward end being urged toward said roll by a tension spring 535 forholding the lead- ..the respective parts in the positions shown inFigure 14, the first step of the operation occurs when cam 955 movespush rod 469 to straighten the anvil-supporting toggle and thereby toraise the anvil so that the top of the forward end of the latter isdisposed slightly below roll 5H3. Cam 416 then operates lever arm 4'14to project the anvil forwardly toward the position shown in Figure 13.As this movement of the anvil progresses, plateau 384 of the anvil movesunder roll M3, and the leading end of tape 509 is gripped 509.therebetween, the spring 459 in the anvilsupporting structurepermitting the anvil to yield suificiently for the blade to pass.Because of the oblique position of blade 585, it severs the,tapeprogressively, whereby the cutting is facilitated.

L The severed end portion of each tape is designated 535, and is shownmost clearly in Figure 22. At this time cam 505 comes into operation tolift piston 589 of pump 599 and thereby to create suction through pipe45'! in passage 595 in the anvil whereby the wrapper tape 535 is held tothe anvil by diiferential air pressure on its opposite faces.

As the anvil continues its forward movement, the trailing end of plateau335 still being urged against roller 5l3 continues the feed of strip559.

until the leading end thereof, back of blade 585, is beyond thelowermost point of roller 5 l 5. When the plateau 485 passes out ofengagement with roller 5E3 the feed of tape 559 ceases, and the anvilcontinues its forward movement to the position shown in Figure 13. Thefeature of continuing the feed of the tape after its leading end portionis severed assures that the leading end of the tape will be in positionto be gripped between plateau and roll 5I3 during the next cycle ofoperation. A leaf spring 53'! of adjustable tension bears against roll5E3 and acts as a brake to prevent overrun of the latter when plateau584 moves out of engagement therewith.

The worm-pressing means When a bead core is received upon feed rolls 393of the unit, the anvils 439 are disposed in their forward position, thetape pieces 535 cover the die slots 553 thereof, the die slots beingdisposed substantially in the same vertical plan-e as the bead core. Thelongitudinal feeding of the latter by said feed rolls carries the innercoretape end into contact with pawl 929 to close switch 535 and stop thelongitudinal feeding, both tape ends then being substantially inalignment with "the die slots 488 of the respective anvils. When thewrapping unit is set in operation by closing of the switch I53 of thewinding unit, the bead core l between feed rolls 593 is deformed fromthe arcuate shape shown in broken lines in Figure 2, to the shape shownin Figure 3, whereby the portion between said feed rolls is depressed,and those regions thereof coinprising its respective tape-ends arepressed into die slots 488 of the respective anvils.

Apparatus for so pressing the bead core comprises brackets 540 mountedbetween each plate 381 and its sideplate 392 at the upper end of thelatter. Mounted upon the front of each bracket 549 is a verticalguide-plate 55 l the lower end of which is positioned adjacent the topof placer plate 422 or 422 Slidably mounted for vertical movement onguide plate 54! is a slide or presser foot 542 that carries an upwardlyextending rod 553 that slides freely through an aperture formed in anoverhanging plate 554 mounted upon the upper end of guide plate 54!.Nuts 5 35 are threaded onto the upper end of rod 543, said nutsconstituting an adjustable stop to limit the downward movement of thepresser foot and to define its lowermost position.

The slides or presser feet 542 are reciprocated in unison by across-head 541 that is positioned between guide plates 5M and carries across-bar 548 that projects laterally through respective verticallydisposed slots 549 formed in each presser foot, there being acompression spring 550 mounted in each slot 549 beneath said cross-bar.The arrangement permits relative movement of the cross-bar and thepresser feet at the lower limit of the latters movement. Manuallyadjustable collars 55! are secured on cross-bar 548 against the outerlateral face of each presser foot to retain the cross-head in medialposition between the said presser feet. When collars 55l are loosened,the plates 38'! may be moved toward each other in the manner and for thepurpose previously described.

The cross-head 54'! is adjustably connected to the upper end of aconnecting rod 553 that extends through a suitable slot 554 in baseplate 339 and has its lower, end connected to one end of a lever 555that is mounted adjacent its opposite end upon a rock shaft 556 that isjournaled in bearing brackets 55'? formed on the under side of said baseplate 339. The other end of lever 555 is connected to one end of atension spring 558 that is connected at its other end to a fixed pointon support 348 within housing 335. The arrangement is such that spring558 normally urges connecting rod'553 and crosshead 55? upwardly. Alsomounted upon rock shaft 555 is a cam arm 559, the free end of whichcarries the usual cam roller that is normally held in engagement withthe surface of a cam 565 by said spring 558, the cam 550 being mountedupon cam shaft 355. The cam 555 is so arranged as to depress connectingrod 553 and cross-head 541, against the tension of spring 555, in timedrelation to the movement of the other operative parts of the machine.

To prevent the bead core l55 from displacement while being deformed andwhile the tape strips 536 are being wrapped thereabout, means areprovided for confining the depending portion of the bead core, as ismost clearly shown in Figures 1 and 27. Said means comprises a rod 552that is mounted in a rocker 553 that is pivotally mounted in a bracket584 on the front wall of housing 335. The bracket 554 carries a rubberbumper 555 against which the rod 552 normally rests in oblique positionwith its upper end remote from said housing. The upper end of rod 552carries an adjustable head 555 provided with a rubber bumper 567, thelatter bearing against the housing wall when the rod is in vertical,operative position as shown in broken lines in the drawings. The rocker553 extends through an aperture in the housing wall and has its innerend pivotally connected to one end of a link 558, the latter extendingtransversely of the housing and having its opposite end extended througha small aperture in the opposite wall of the housing. A compressionspring 588 is mounted upon the link between a collar 518 thereon and thelast-mentioned housing wall, the arrangement being such as normally tourge link 568 toward rocker 553 and yieldingly to hold the latter in thetilted position shown in full lines in the drawings.

A push rod 572 extends freely through an aperture in that end portion oflink 568 that is connected to rocker 553, the push rod having yielding,lost-motion connection with the link through the agency of collars 573,5% respectively, mounted on the push rod above and below the link, and acompression spring 515 on the push rod between collar 513 and the link.Upon the upper end of push rod 5'12 is a lost motion slip joint 515having pivotal connection with a link 517'! connected to the free end oflever 555. The arrangement is such that rod 552 is moved from the fullline position shown in Figures 1 and 27 to the broken line positionshown therein by the lever 555 in timed relation to the operation ofpresser feet 542.

For depressing and deforming the bead core H55, the inner or adjacentlateral sides of the presser feet 552 carry respective brackets 580 attheir lower ends, and in each of said brackets is journaled a presserroller 58! that is disposed below the lower end of the presser foot, theaxes of said rollers being disposed transversely with relation to thebead core. It is the rollers 58! that engage the bead core and force itto the position shown in Figure 3. This straightening of the bead corebetween feed rolls 393 shortens its length between the latter, and tocontrol the resulting longitudinal displacement or" the core structureso that the tape ends of the bead core will be properly positioned withrelation to the anvils 539, means is provided for engaging and holdingthe bead core at a determinate point so that such displacement takesplace at one side of said point.

Said means comprises a vertically disposed dog 553 that is slidablymounted in a bracket 584 that is mounted upon the outer lateral face ofthat presser foot 542 that is positioned at the righthand side of theunit as viewed in Figures 2 and 3. The dog 583 is disposed above and inalignment with the right-hand feed roll 393, with which it cooperates inholding the bead core as presently will be explained. The lower end ofthe dog is sharpened as shown, and its upper end is angularly bent andconnected to one end of a tension spring 585, the other end of thelatter being connected to a latch member 585 that is pivotally mountedat 581 on bracket 58 i. latch member 585 has an upwardly extendingportion having a notched free end for engagement with the angular upperend portion of dog 583. The latch member also has a laterally extendinglug engageable with an adjustable stop 588, Figures 2 and 3, carried bya bracket 589 that is mounted atop of bracket 540 when the presser foot542 is in its uppermost position. The arrangement is such that the dog583 is unlatched when the machine is in the inoperative position shownin Figure 2, the pointed lower end of the dog being below presserrollers 58!. As the presser feet 542 are lowered, dog 583 engages beadcore I55 upon the right-hand feed roll 353 and holds it stationary atthis point while the presser rollers flatten the bead core between feedrolls 393; thus moving the flattened portion of the core slightly in acounter-clockwise direction and accurately positioning the tape ends ofthe core over die slots 488 of the anvils 439 before the core is movedinto said die slots.

When the presser feet 542 are in their lowermost position, as shown inFigure 3, the upper end of dog 583 has been lifted, against the tensionof spring 585, to the level of the notch in the free end of latch 586,the latter swinging into engagement with the dog by reason of theovercenter connection therewith of spring 585. Thus the dog 583 islifted from the bead core immediately the presser feet subsequentlystart to rise. When the presser feet reach their upper limit, latch 586engages stop 588 and thereby is withdrawn from the dog 583, permittingthe spring 585 to restore both dog and latch to normal inoperativeposition shown in Figure 2.

Fixedly mounted upon the front of each presser foot 542 and extending tothe inner side thereof is a guide finger 591 that extends -downwardlybelow the lower end of the presser foot, the rear edge of the guidefinger being beveled as shown.

The

The function of said guide fingers is to engage bead core I55 during thedownward movement of the presser feet, and to move said bead corerearwardly to proper position over die slots 588 of the anvils if it isnot already in said position so

